I've used this plugin on another site I work for and it is an excellent plugin very powerful. But.. I have to agree with WebNashr it should at least warn people from the start that this is not the complete plugin. Thanks to ActionJackson676 there is a fix for the broken aspect of the free part of the plugin but WPMuDev should know better than to let people use a broken Plugin. If they are going to allow a free side to this it shouldn't be throwing errors in the Admin area.
All and all a solid plugin but poorly implemented for non premium users. Because of this I give it 3 stars.